<s>
Mentat	B-Language
is	O
a	O
macro-dataflow	O
extension	O
of	O
the	O
C++	B-Language
programming	I-Language
language	I-Language
.	O
</s>
<s>
It	O
was	O
developed	O
at	O
the	O
University	O
of	O
Virginia	O
computer	B-General_Concept
science	I-General_Concept
Department	O
by	O
a	O
research	O
group	O
led	O
by	O
Andrew	O
Grimshaw	O
.	O
</s>
<s>
The	O
combination	O
of	O
the	O
ideas	O
needed	O
to	O
implement	O
the	O
Mentat	B-Language
run-time	O
with	O
the	O
ideas	O
in	O
Carnegie	O
Mellon	O
University	O
's	O
Hydra	B-Application
distributed	O
operating	B-General_Concept
system	I-General_Concept
led	O
to	O
the	O
Legion	B-Operating_System
distributed	O
OS	O
.	O
</s>
